I recently reformatted my computer due to an some apparent issue that my sister caused. Now it works fine, but my internet won't work . It is an actual CPU and I always used a wireless adapter on the computer. I reinstalled the software and it shows that it is "connected" but still no actual internet. I am posting this from my laptop which is also on this network through wireless so I know it works. Any suggestions??

Make sure that all the configurations are as they are supposed to, example IP address...

What version of Windows on the box? Did you run the Wireless Internet wizard?